What are the chances for PGDM with Mat score 686

You are likely to get a call from SIES PGDM, Kindly prepare well for the GDPI. All the Best

Its little bit difficult to convert with this score because according to last year only 20% wightage given to the written exam and 80% for GD-PI that means your selection depend on the GD-PI. You can try with this score but in my way try Feb MAT/CMAT or Mh-CET and give your best for good score.